A power management system includes a direct current-direct current DC-DC conversion circuit, a first control circuit, a charging circuit, an input port, and an output port. The input port is configured to receive an input voltage. The output port is configured to supply an output voltage to a load. The DC-DC conversion circuit is configured to charge the output port from the input port, to adjust the output voltage. The first control circuit is configured to: obtain a second feedback voltage of the output voltage from the output port, generate a first control signal based on the second feedback voltage and a second reference signal, and supply the first control signal to the charging circuit. The charging circuit charges the output port from the input port based on the first control signal, to supplementally adjust the output voltage.
Legal claims defining the scope of protection, as filed with the USPTO.
2. The power management system according to claim 1, wherein the first control circuit comprises a comparator, configured to compare the second feedback voltage with the second reference signal to obtain the first control signal.
3. The power management system according to claim 2, wherein the comparator is a hysteresis comparator.
4. The power management system according to claim 3, wherein the second reference signal comprises a plurality of threshold signals used for hysteresis comparison by the hysteresis comparator.
11. The electronic device according to claim 10, wherein the first control circuit comprises a comparator, configured to compare the second feedback voltage with the second reference signal to obtain the first control signal.
12. The electronic device according to claim 11, wherein the comparator is a hysteresis comparator.
13. The electronic device according to claim 12, wherein the second reference signal comprises a plurality of threshold signals used for hysteresis comparison by the hysteresis comparator.
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September 23, 2022
December 17, 2024
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